Add debugging information for nacl_io library.

native_client_sdk/doc_generated/devguide/coding/nacl_io.html

Index: native_client_sdk/doc_generated/devguide/coding/nacl_io.html
diff --git a/native_client_sdk/doc_generated/devguide/coding/nacl_io.html b/native_client_sdk/doc_generated/devguide/coding/nacl_io.html
index 757899a56f420bed3e8c32f2085b1e5fdb7c0fe1..328d062c8512c66d1ac580d4754b3094da3a9fba 100644
--- a/native_client_sdk/doc_generated/devguide/coding/nacl_io.html
+++ b/native_client_sdk/doc_generated/devguide/coding/nacl_io.html
@@ -12,7 +12,7 @@
 <li><a class="reference internal" href="#a-look-at-the-code" id="id5">A look at the code</a></li>
 </ul>
 </li>
-<li><a class="reference internal" href="#reference-information" id="id6">Reference information</a></li>
+<li><a class="reference internal" href="#additional-information" id="id6">Additional information</a></li>
 </ul>
 
 </div><h2 id="introduction">Introduction</h2>
@@ -203,13 +203,15 @@ int HandleFwrite(int num_params, char** params, char** output) {
   return 0;
 }
 </pre>
-<h2 id="reference-information">Reference information</h2>
+<h2 id="additional-information">Additional information</h2>
 <p>The example discussed here is included in the SDK in the directory
 <code>examples/demo/nacl_io_demo</code>.</p>
 <p>The nacl_io library is included in the SDK toolchain and is not a part of the
 Pepper API. For reference information related to the nacl_io interface see
 its header file in the SDK directory, located at
 <code>include/nacl_io/nacl_io.h</code>.</p>
+<p>The logging system for nacl_io writes directly to the stderr stream of the NaCl
+process. For more information, see the <a class="reference internal" href="/native-client/devguide/devcycle/debugging.html#nacl-io-debugging"><em>nacl_io section</em></a> of the debugging page.</p>
 <p>For more about the HTML5 file system read the <a class="reference external" href="http://dev.w3.org/2009/dap/file-system/pub/FileSystem/">specification</a>.</p>
 </section>